Ctesiphon was the big city of the Iranian empires between the Parthians and the Sassanians. It was the site of several battles and despite its strategic location proved more vulnerable to invasions, with the Romans capturing the city multiple times in its lifespan while their Iranian counterparts couldn't even capture Constantinople.
This also may have been why the Sassanian Empire took a bigger brunt of the Muslim invasions relative to the Romans, due to the city's proximity to the Arab heartland. Furthermore, Baghdad was established as the Abbasid capital, and much of the city's material was used in its construction, leaving the area an abandoned ruin by the turn of the 9th century.
Was this always gonna happen? Or is it possible that a Caliphate chooses to take over the city instead?
This also may have been why the Sassanian Empire took a bigger brunt of the Muslim invasions relative to the Romans, due to the city's proximity to the Arab heartland. Furthermore, Baghdad was established as the Abbasid capital, and much of the city's material was used in its construction, leaving the area an abandoned ruin by the turn of the 9th century.
Was this always gonna happen? Or is it possible that a Caliphate chooses to take over the city instead?